Urban Rewilding

Cities have long been imagined as the very antithesis of nature, places where concrete and commerce crowd out every wild thing. In recent years, however, a movement known as urban rewilding has begun to challenge that assumption, proposing that even the densest metropolis can make room for genuinely flourishing ecosystems. Rather than merely planting decorative flowerbeds, rewilding seeks to restore self-sustaining natural processes within the urban fabric: rivers freed from concrete channels, meadows left deliberately unmown, and corridors of vegetation that allow wildlife to move freely through the city. The aim is not to recreate a pristine wilderness, which would be plainly impossible, but to let nature （ 1 ） amid the buildings and streets that people continue to inhabit. Advocates describe it less as a landscaping fashion than as a change of philosophy, a decision to work with natural processes rather than perpetually against them, and to accept a measure of unpredictability in exchange for genuine ecological life. The transformations it envisions are often gradual and unglamorous, unfolding over decades rather than seasons.

The benefits its advocates cite are strikingly practical as well as ecological. Restored wetlands and unpaved ground absorb the sudden downpours that increasingly overwhelm ageing drainage systems, reducing the risk of urban flooding. Trees and green spaces cool neighbourhoods during heatwaves, filter pollutants from the air, and offer refuge to the pollinators whose decline threatens agriculture far beyond the city limits. （ 2 ）, a growing body of research links access to green space with measurable improvements in mental health, suggesting that the wilder city may be a healthier one for its human residents too. Nature, on this view, is not an amenity to be visited on weekends but an infrastructure quietly woven into daily life. Framed in this way, the case for greenery ceases to be merely aesthetic and becomes a matter of public health, flood control, and long-term resilience, concerns that even the most hard-headed city planners can scarcely afford to dismiss.

Rewilding is not without its tensions, however. Landscapes deliberately left untidy can strike residents accustomed to manicured parks as neglected or even unsafe, and reconciling genuine wildness with the demands of a crowded city requires careful and continual negotiation. Reintroduced animals may stray into places where they are decidedly unwelcome, and space in a valuable city is fiercely contested. Every square metre handed over to a meadow or a marsh is a square metre denied to housing, parking, or profit, and in a crowded city such trade-offs are seldom decided on ecological grounds alone. Yet proponents argue that these frictions are （ 3 ）, and that learning to share urban space with other species may reshape how people understand their own place in the natural world. If the twentieth-century city was built to hold nature firmly at bay, the twenty-first, they hope, may be designed to welcome it back in. The outcome, in the end, may depend less on ecology than on what kind of city its inhabitants ultimately decide they wish to live in.